wolves {rrcov} | R Documentation |
Skull dimensions of the wolf Canis lupus L.
Description
A data set containing skull morphometric measurements on Rocky Mountain and Arctic wolves (Canis Lupus L.). The tdata are published in Morrison (1990), originally from Jolicoeur (1959).
Usage
data(wolves)
Format
A data frame with 25 rows and 12 variables. The variables are as follows (all measurements are in milimeters):
-
class
: a factor presenting the combinations oflocation
andsex
. The levels arearf
arm
rmf
andrmm
-
location
: a factor with levelsar
=Arctic,rm
=Rocky Mountain -
sex
: a factor with levelsf
=female,m
=male -
x1
: palatal length -
x2
: postpalatal length -
x3
: zygomatic width -
x4
: palatal width outside first upper molars -
x5
: palatal width inside second upper molars -
x6
: postglenoid foramina width -
x7
: interorbital width -
x8
: braincase width -
x9
: crown length
Source
Jolicoeur, P. Multivariate geographical variation in the wolf Canis lupis L., Evolution, XIII, 283–299.
Morrison, D. F. Multivariate Statistical Methods, (3rd ed.), 1990. New York: McGraw-Hill, p. 288–289.
Examples
data(wolves)
## Remove the factors location and sex which we will not use for now
x <- wolves[,-c(2:3)]
## Plot a pairwise scaterplot matrix
pairs(x[,2:10])
mcd <- CovMcd(x[, 2:10])
plot(mcd, which="pairs")
lda <- LdaClassic(class~., data=x)
lda@center
lda@cov
predict(lda)